Automobile jack



Teb. 12,1924.- 1,483,603

T. w. BIBB AUTOMOBILE JACK Filed April ll. 1923 2 Sheets-.Sheet 1 31a/vento@ Feb. 12 1924.

T. W. BIBB AUTMOBILE JACK Filed April 11. 1923 2 Sheets-Sheet 2 Patented Feb. 12, 1924.

marea THOMAS 'WILLIAM BIBB7 OF ELLENSBURG, WASHINGTON.

AUTOMOBILE JACK.

VApplication led April 11, 1923. Serial No. 631,455.

To all whom t may concer/n.'

Be it known that I, THOMAS W. BIBB, citizen of the United States, residingvat Ellensburg, in the county of Kittitas and State of Washington, have invented certain new and useful Improvements in Automobile Jacks; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in lifting jacks for automobiles and the like.

The object of the invention is to provide a device of the character indicated of an improved and simplified structure adapted to be carried in a compact form, and to use with the aid of the foot alone.

Further objects will more particularly appear in the course ofthe following detailed description.

The invention consists in lthe novel construction, arrangement, and combination of parts as hereinafter more particularly described and claimed.

Two sheets of drawings accompany this specification as part thereof,.in which like reference characters indicate similar parts throughout.

Figure 1 is a horizontal cross section taken substantially medial the device;

Fig. 2 is a side elevation;

Fig. 3 is a vertical cross section showing one standard removed;

Fig. 4 isa fragmentary sectional view taken on line 1 -4 of Fig. 3.

Fig. 5 is a fragmentary sectional view taken online 5-5 of Fig. 3;

Fig. 6 is a transverse cross section of the handle joints.

In accordance with lthe present invention, va suitable base plate 1 'is provided, to which is secured a yframe 2, which may be conveniently formed from sheet metal bent and stamped to provide two parallel spaced standard parts 3,-3,provided with 'aligned vertically extending slots 4.-, and arcuately shaped pivot-bearing slots 9.

Between the standards 3 3 is slidably mounted a rack 5 having laterally disposed guide lugs 6 adapted to slide in the slots 4 and having upon one face thereof rack teeth 8. Secured to the top of the rack 5 is a suitable head 7 which may be pivotally 0r otherwise secured thereto.

Between the standards 3-3 and adjacent y base 1 is mounted a lever 11 having laterally disposed pivot lugs 10-1O adapted to slide in the arcuate slots 9-9 of the standards. To the end of lever 11 adjacent rack 5 is pivoted a vertically extending dog 16, having a nose 19 adapted to engage and vertically elevate rack 5. `Adjacent pivot lugs 10-10 but eccentrically disposed relative thereto is a pivot-bearing 13, disposed intermediate the axis of lugs 10--10 and the rack 5. Upon the pivot-bearinv 13 is mounted vertically 'extending pawl 1I, the nose 18 of which is adapted to engage teeth 8 above the nose 19 of dog 16. Dog 16 is connected with pawl 17 adjacent their rack engaging ends by means of a resilient member 22, preferably a spring bent into substantially W-shape, and. having its ends secured as by lugs 20, 21 to the pawl and dog respectively. This spring is so proportioned and 'formed as to exert either a push or pullbetween the dog and the pawl, as will hereinafter more clearly appear in describing the operation of the device. i

` Mounted uponthe inner face of one of the standards 3, or in any other suitable manner, is a stop lever 23 adapted totengage spring 22 to cause said spring to eX- ert a push effect to both the dog and the pawl. Stop lever 23 is connected as by rod 25 with a lever 26 pivoted adjacent the bottom of standards 3-3, and provided with a slot adapted to receive one of the pivot lugs 10 of lever 11. f

Hingedly connected to the outer lend of lever `11, as by pivot 32 is a handle part 15, preferably formed of sections of sheet metal 30, stamped into U-shape cross section and connected yby rule joints disposed with vthe shoulders 31 of the rule joints directeddownwardly as is illustratedy in Fighad the rule joints connecting the handle sections the `handle affords a rigidresistanceto downward pressure, which Amaybe exerted by the foot of the operator, thus rocking `lever 11 upon pivot 10-10 and elevating dog 16 and rack 5. During this operation the push tension of spring 22 operating upon paivl 17 retains said pawl in contact with the rack to secure itin the position to Which it is raised by the dog 16.

lBy'`.reason `of the yeccentric pivoting of pawl 17 relative to lever 11- the weight ot peat the operation and so on successively until the load has `been elevated .to the desired height.

When it is desired to lower the vehicle, handle 15 is pulled backvf'ardly, thus 'shifting the pivot of lever 11 to the rear ends rof slots 9 9 and at the same stime operating lever 26, which, cooperating with rod 25 raises stop lever 23, thus releasing spring 22. Spring 22 being relieved of the `pressure ofstop lever 23, willoperate upon the elevation of dog '16 to exert apush on .pawl 17, thus clearing thenose 18 of pawl 17 from the rack and permitting the lowering ot' dog 16 with the [rack until atapproximately the end of the stroke of lever 11 spring'22 will exert a pull upon .pawl 17, dra-wing its nose 18 again into engagement Vwith the rack. A slight further movement'of lever 11 ,releases dog 16 from the weightof the load and permits the pull of spring 22 to retract its .nose from engagement with the rac-lr and, thuspermit the elevation of dog 16 .to repeat the steps of this operation successively.

Various modifications in the ,precise form yand details of construction will readily-suggest themselves to those skilled Ain the art,

for actuating the rackandpawl -means operative both to secure the rack and to return the dog and its rlever to operative position.

3. In a jack, a rack, a lever, a dog operatedk by the lever for actuating the rack, and a pawl mounted upon the lever eccentrically with respect to its pivot to control the. rack and operate the lever as specified.

4. In a jack, a rack, a pivoted lever, a dog pivoted to vthe lever to operate the rack, a pawl pivoted to the lever intermediate the lever pivot and the dogfpivot, and resilient means connecting the dog and pawl.

5. A jack comprising a frame, a rack slidable in the frame, a lever having a sliding pivotal mounting in the frame, a dog pivotally mounted on the lever, a pawl pivotally mounted on the lever eccentrica-lly with respect to the latters pivot, resilient means connecting the dog and pawl, stop means operative on said resilient means and means whereby the shifting of the pivotal mount of the lever relative the frame will operate the stop.

6. A jack comprising a frame, a rack slidable in the frame, arcuate slide pivotbearing surface in said'frame, a lever slidably pivoted on said bearing surfaces, al dog pivoted to the lever to operate the rack, a pawl pivoted to the lever eccentrically with respect to the latters pivot, resilient means connecting the dog and pawl to control their relation, a stop lever operative on said resilient means and lever means operative by the sliding of the pivotal mount of the first mentioned lever to control said stop lever.

7. A jack comprisinga frame, a rack slidable in the frame, arcuate slide pivot-bearing surfaces in said frame, a lever slidably pivoted on said bearing surfaces, a dog pivoted tothe lever to operate the rack, a pawl pivoted to the lever eccentrically with respect to the latters pivot, `resilient means connecting vthe dog and pawl adapted to exert either a pull or push therebetween.

8. A jack comprisinga trame, a rack slid-- able in the frame, arcuate silde pivot-bearing surfaces in said frame, a lever slidably pivoted on said bearing surfaces, a dog Apivoted to the lever to operate the rack, apawl pivoted to the lever eccentrically with respect' to the latters pivot, resilient means connecting the dog and pawl comprising-a substantially W-shape spring having its ends secured to'said members respectively.

'In testimony whereof I- aiX my signature.

THOMAS WILLIAM BIBB. 

